Connecting means fob conductors of



P 30, 1947- w. A. BRUNO Re. 22,920

CONNECTING MEANS FOR CONDUCTORS OF COAXIAL ELECTRICAL TRANSMISSION LINES Original Filed Nov. 14, 1942 2 Sheets-Sheet l INVEN TOR.

- W/u/AM ABM/v0 I p 1947- w. A. BRUNO Re. 22,920

CONNECTING MEANS FOR CONDUCTORS OF COAXIAL ELECTRICAL TRANSMISSION LINES Original Filed May. 14, 1942 2 Sheets-Sheet 2 INVENTOR. W/L L/AM A. BRUNO Reiuued Sept. 30, 1947 CONNECTING MEANS FOR CONDUCTORLS OF COAXIAL ELECTRICAL TRANSMISSION LINES William A. Bruno, deceased, late of New Hyde Park, N. Y., by the firm Bruno Patents, Inc., Long Island City, N. Y., assignee Original No. 2,365,048, dated December 12, 1944,

Serial No. 465,592, November 14, 1942. Application ior reissue November 10, 1945, Serial No.

Claims.

This invention relates to transmission lines of coaxial, electrical conductors, in which one conductor is concentrically located inside of the other, and has particular relation to improved means for connecting two sections of coaxial, electrical conductors. one of which is stationary while the other is capable of rotary movement relative to the stationary conductor.

One object of this invention is to provide a gas-tight connecting means for two axially aligned outer conductor sections of a co-axial, electrical transmission line one of said conductor sections being capable of rotary movement relativetothe other. Another object of this invention is to provide a connecting means of the above mentioned type, which forms a gas-tight and fluid-tight seal and permits 01' rotary movement of one of the conductor sections relative to the other.

A further object of this invention is to provide connecting means whichis adapted to be applied to axially aligned conductor sections of co-axial' transmission lines and to provide for gaseous and fluid seal during rotation of said sections relative to each other.

Other objects and advantages will appear to those skilled in the art from the following specification and claims, and the appended drawings which illustrate, by way 01' example, certain preferred embodiments of the invention, and in which:

Fig. 1 is a vertical, sectional view of it connecting means providing for gaseous seal according I to my invention;

Figs. 1A and 1B show modified forms of the sealin element used in the embodiment shown in Fig. 1;

Fig. 2 is a vertical sectional view of a connecting means providing for gaseous and liquid seal according to this invention; and

Fig. 3 is a vertical sectional view of a modified embodiment of such connecting means.

Refen'ing now to Fig. 1, a tubular outer conductor element I of a co-axial electrical transmission line is connected with a right angle branch piece 2, i. e. by soldering at the V-shaped incision 3. Outer conductor element I is capable oi rotary movement, and axially aligned with outer conductor element 4, which is stationary and has an interior conductive surface, the shape and dimensions of which are substantially equal to those of outer conductor element I. The end portion. of stationary conductor element 4 is housed, as shown, by flanged element or cover I. This element 8 rests on flanged tubular casing I. The flange of the latter is provided with an annular groove 8 housing a resilient ,gasket 9 and adapted to receive a registering annular projection I 0 of element 6. drawings, conductor element I is axially aligned with element 4 and telescopically engages with its slotted end II the adjacent end of conductor section 4.

A ball bearing I2 fitting into casing l is arranged in said casing and held in place by suitable fastening means not shown in the drawings. A gas-tight seal for the joint of conductor sections I and 4 is obtained by the use of a sealing element comprising ring I4 consistingpreferably of a suitable metal and annular element IS. The latter consists of a suitable resilient material, and is connected with rin I4 1. e. by molding. The sealing element is inserted in casing I and held in place between a shoulder of the tubular wall of casing I or a projection I'I provided on said shoulder, and the upper end portion of spacing ring I5 while its inner annular end portion 21 bears against conductor section I and forms a gaseous seal. Ring I5 rests on the upper surface of a second ball bearing I2 fitting into casing I and held in place by cover II, which is adapted to be screwed into the threaded end portion III of easing 1. Upon assembling the above described parts, cover I8 is screwed into.

threaded portion I9 until a. moderate pressure is exerted on portion 26 of resilient element It, and inner annular end portion 21 of this element bears against outer conductor I to form a gas-tight seal for the joint of conductor sections I and 4, and for gas escaping from the interior of the co-axial cable through the slots of end portion II.

As will be understood from the foregoing, outer conductor 4. element I5 and easing I are stationary, while conductor element I is capable of rotary movement under gaseous seal. Element I 6 preferably consists of synthetic, oil-resistant rubber, but any other sufllciently resistant and resilient material may also be used. The inner con duotor elements (not shown in the drawings) of the co-axial cable line are centrally arranged in the customary manner.

Fig. 2 illustrates another embodiment of the invention and shows a connecting means forming a gas-tight and liquid-tight seal for the joint of two axially aligned co-axial cable sections, one of which is stationary, while the other is capable of rotary movement relative to said stationary conductor sections. Conductor sections I and 4, cover elements 6, tubular casing 1, ball bearing I2 As shownln the cacaoandfirstsealing element comprisingring ll, and

annular. resilient element II, as well as the mutual relation and arrangement or these elements,

are substantially similar to the ding elements shown inFig. l. Spacing ring ll isprovided with a hole Ii which communicates with a corresponding hole II" in the wall oi tubular casmg I. Hole I!" can be closed by means not shown in the drawings. A second sealing element,

in casing I, and oil may be introduced into the" space between saidfirst and second sealing elements through holes I! and II". In order to ob-' tain an oil-tight seal, an annular sealing element It and a metal ring 31 are introduced into casing I, said elements and 31 being held in place by ball-bearing it, which in turn is supported by cover ll adapted to be screwed in the threaded entl portion IQ of easing I. Aiter assembling the above described elements, cover II is screwed into threaded portion l9 oi casing I until the necessary pressure is exerted on portion It and 26' oi annular elements It and I6, respectively, and ring element 36, which consists at a resilient, oilre'sista'nt material, such as neoprene. forms a tight seal for the oil introduced through holes Inthe embodiment illustrated in Fig. 3, conductor sections l and l, coyerelement i, tubular casing I, ball hearing it, and first sealing element comprising ring I4, and annular, resilient element l6, as well as the relation and arrangement, of these elements are similar to the corresponding elements and their arrangement illustrated in Fig. 2. The lower end portion of spacing ring I! is inwardly tapered. Outer peripheral portion 26' of annular sealing element l6 fits to the tapered end portion of ring i5 and annular elements ii and I6 are adapted to form a tight seal for grease introducedinto the space between annular elements l6 and it, while element It is adapted to iorm a gaseous seal for the joint oi conductors I and l. Sealing elements l8 and I8 are held in place by spacing ring l5, ring 41, ball bearing l2 and cover l8 which is adapted to be screwed in threaded end portion l9 oi casing I, and to cause sumcient compression oi the outer peripheral portions 26 and 26' oi elements It and l6. s

As shown in Figs. 1, 2 and 3, a resilient cover ll may be fastened to cover I8. This resilient cover ll is fastened to cover l 8, and has a flexed annular portion 42, serving to prevent the entrance oi dust oiother impurities into casing I.

Figures 1A and 1B illustrate two somewhat modified embodiments oi sealing elements which may be used instead oi sealing elements l8 shown in Figs. 1, 2 and 3, or sealing element ll shown in Figs. 1 and 2.

Insteadoi the ball bearings shown, other suit-J fined in the appended claims.

What is claimed is: v

1. In a coupling means ior a first stationary tubular conductor section of a co-axial, electrical transmission line and a second tubular conductor section axially aligned with said first section and capable oi rotating movement relative to said first section a stationary, tubular casing rotatably housing an end portion oi said second conductor section. said tubular casing being in gas-tight connection with ajcover housing the joint of said first and second conductor section. said second; conductor section being capable oi rotating m'ovement in a first and second bearing, said bearings being in spaced relation to each other and housed by said casing. a first annular sealing means fitting into the casing. comprising a rigid ring and an annular resilient sealing element connected to said ring and overlapping at least one end portion of said ring, one outer peripheral end portion oi said first sealing means bearing against a shoulder formed in the inner'tubular surface 01' the casing, and the other outer peripheral end portion 0! said first sealing means abutting upon one end portion oi a spacing ring, the other end portion of which is inwardly tapered, a second annular 'sealing means'comprising a rigid ring and an annular resilient sealing element connected to said ring, one outer peripheral end portion 01' the resilient element of said second sealing means fittingto said inwardly tapered end portion of the spacing ring, said second sealing means being arranged between the spacing ring and the second bearing, a tubular cover having a threaded tubular portion adapted to be screwed into a threaded end portion of the casing and to cause compression oi outer peripheral portions of resilient elements oi said first and second sealing means, an inner peripheral end portion of the annular, resilient sealing element oi the first sealing means bearing against the second conductor section, and being adapted to iorm a gas-tight seal ior the joint oi the first and second conductor section, an inner peripheral end portion of the annular, resilient sealing element oi the second sealing means bearing against the second conductor section, said first and second sealing means forming a seal for the space encompassed by these sealing means, the second conductor section and the casing.

2. In a coupling means ior a first stationary tubular conductor section of a co-axial, electrical transmission line, and a second tubular conductor section axially aligned with said first section and capable of rotating movement relative to said first section, a stationary, tubular casing rotatably housing an end portion of said second conductor section, said tubular casing being in gastight connectionwith a cover housing the Joint oi said first and second conductor section, said second conductor section being capable of rotating movement in a first and second bearing, said bearings being in spaced relation and housed by said casing, a first annular sealing means fitting into the casing and comprising a rigid ring and an annular resilient sealing element connected to said ring, one outer peripheral end portion of said first sealing means bearing against a shoulder formed in the inner tubular surface of the casing,-and the other outer peripheral and portion of said first sealing means abutting upon one end portion of a spacing ring, the other end portion of which abuts upon an outer peripheral end portion of a second annular sealing means comprising a rigid ring and an annular, resilient sealing'element connected to said ring and overlapping at least one end portion of said ring, a third annular, resilient sealing means having a tapered outer peripheral portion abutting against the other outer peripheral end portion of the second sealing means, and arranged between the second sealing means and the second bearing, a tubular cover having a threaded tubular portion adapted to be screwed into a threaded end portion of the casing, and to cause compression of outer, resilient peripheral portions of said first, second and third sealing means, an inner peripheral end portion of the annular resilient sealing element of the first sealing means bearing against the second conductor section to form a gas-tight seal for the joint of the first and second conductor section, an inner peripheral end portion of the annular, resilient sealing element of the second sealing means bearing against the second conductor section. saidfirst, second and third sealing means forming a seal for the space encompassed by the first and second sealing means and the second conductor section and the casing.

3. In a connecting means for a first stationary tubular conductor section of a co-axial, electrical transmission line, and a second tubular conductor section axially aligned with said first section and capable of rotating movement relative to said first section, a stationary tubular casing rotatably housing an end portion of said second conductor section, said tubular casing being in gas-tight connection with a cover housing the Joint of said first and second conductor section, and annular resilient sealing means for the coaxial transmission line, said sealing means being housed by said casing, said sealing means consisting of an outer peripheral reinforcing and pressure-transmitting rigid ring of [-shaped cross-section, said ring being connected with a registering outer profile of a resilient sealing element having an annular peripheral portion overlapping at least one end portion of said ring. and having a centrally converging. tapering portion having conical surfaces, bearing against the second conductor section, means for holding an outer peripheral portion of said resilient sealing means in compressed condition in said casing.

said sealing means being adapted to form a gastight seal for the Joint of the first and secondconductor section.

4. In a coupling means for a first stationary tubular conductor section of a co-axial, electrical transmission line, and a second tubular conductor section axially aligned with said first section and capable of rotating movement relative to said first section, a stationary, tubular casing rotatably housing an end portion of said second conductor section, said tubular casing being in gastight connection with a cover housing the Joint of said first. and second conductor section, said second conductor section being capable of rotating in a first and second bearing. said bearings being in spaced relation to each other and housed by said casing, an annular sealing means fitting into the casing, said sealing means comprising an outer peripheral, reinforcing and pressuretransmitting rigid ring of [-shaped cross-section,

eral end portion of said sealin means abutting upon a spacing ring arranged between said sealing means and the second bearing, a tubular cover having a threaded tubular portion adapted to be screwed into a threaded end portion of the casing and to cause compression of outer peripheral portions of the resilient element of the sealing means arranged between said shoulder and said spacing ring.

5.. In a coupling means for a first stationary tubular conductor section of a co-axial, electrical transmission line, and a second tubular conductor section axially aligned with said first section and capable of rotating movement relative to said first section, a housing cover, a tubular casing having a closure at one end and the housing cover at its opposite end of said casing. housing an end portion of said second conductor section, said tubular casing being in gas-tight connection with said housing cover; said housing cover encasing the joint of said first and second conductor section, first and second bearings supporting said second conductor section with respect to said casing, means for mounting said first and second conductor sections to render them capable of relative rotation with respect to each other in said first and second bearings, means for supporting said bearings in spaced relation to each other in said casing. an annular sealing means fitting into the casing, said sealing means comprising an outer peripheral, reinforcing and pressure-transmitting rigid ring of [r'shaped cross-section, said ring being connected with a registering outer profile of a resilient sealing element having an annular peripheral portion overlapping one end portion of said ring, and havinga centrally converging, tapering portion having conical surfaces, bearing against the second conductor section, said sealing means being adapted to form a gas-tight seal for the joint of the first and second conductor section, one outer peripheral end portion of said sealing means bearing against a shoulder formed in the inner tubular surface of the casing, and a spacing ring. the other outer peripheral end portion 01' said sealing means abutting upon said spacing ring arranged between said sealing means and the sec- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 980,776 Hardsocg Jan. 3, 1911 1,805,956 Shonnard May 19, 1981 2,332,529 Reppert Oct. 26, 1943 Phillips Aug. 22, 1944 

